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SubjectRe: [PATCH 3/7] dax: Add missing annotation for wait_entry_unlocked()
On Tue 31-03-20 21:46:39, Jules Irenge wrote:
> Sparse reports a warning at wait_entry_unlocked()
>
> warning: context imbalance in wait_entry_unlocked()
> - unexpected unlock
>
> The root cause is the missing annotation at wait_entry_unlocked()
> Add the missing __releases(xa) annotation.
>
> Signed-off-by: Jules Irenge <jbi.octave@gmail.com>
> ---
> fs/dax.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/fs/dax.c b/fs/dax.c
> index 1f1f0201cad1..adcd2a57fbad 100644
> --- a/fs/dax.c
> +++ b/fs/dax.c
> @@ -244,6 +244,7 @@ static void *get_unlocked_entry(struct xa_state *xas, unsigned int order)
> * After we call xas_unlock_irq(), we cannot touch xas->xa.
> */
> static void wait_entry_unlocked(struct xa_state *xas, void *entry)
> + __releases(xa)

Thanks for the patch but is this a proper sparse annotation? I'd rather
expect something like __releases(xas->xa->xa_lock) here...

Honza

> {
> struct wait_exceptional_entry_queue ewait;
> wait_queue_head_t *wq;
> --
> 2.24.1
>
--
Jan Kara <jack@suse.com>
SUSE Labs, CR

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